Kill Your Tech Interview
Top 65 Docker Interview Questions
Entry Junior Mid Senior Expert
Theoretical Questions
Q1g6z6:
kltuizaWhat is Docker?nzb
Entry
Junior
Q3qezK:
kvozhoaCan you remove (‘docker rm’) a container that is paused?lzkyrf
Junior
Q4Qgn:
liwyDo I lose my data when the Docker container exits?dndxpv
Junior
Q5fpB:
ecrvvWhat is Build Cache in Docker?mdsnium
Junior
Q6AG8D:
xacWhat’s the difference between a repository and a registry?vom
Junior
Q7AQS:
qicwkeHow to build envrionment-agnostic systems with Docker?ftyuc
Junior
Q8txC:
bycp How to link containers?vooqy
Junior
Q9ubn:
mrkjWhat type of applications - Stateless or Stateful are more suitable for Docker Container?qpfr
Junior
Q1009X:
kmkvWhat is Docker image?lori
Junior
Q11DYj:
ijblWhat is Docker container?blibku
Junior
Q12H82:
momyxWhat is the difference between CMD and ENTRYPOINT in a Dockerfile?uffw
Junior
Q13CYZ5:
ebrkqmWhat is the difference between ‘docker run’ and ‘docker create’?jrmy
Junior
Q14WsRBj:
bubeuapIs there a way to identify the status of a Docker container?uaaf
Junior
Q15jmC:
ckyfkdWhat are the most common instructions in Dockerfile?jfa
Junior
Q16Bf6uQ:
ljoWhat are the various states that a Docker container can be in at any given point in time?zdm
Junior
Q17d52:
wcvowcmWhat is Docker hub?gukvypn
Junior
Q18QdF:
ytsazWhat is the difference between the hrhxCOPYbpth and yfgmaADDjgmwu commands in a Dockerfile?dcy
COPYbpth and yfgmaADDjgmwu commands in a Dockerfile?dcy Junior
Q19xYY:
jspeWhen would you use ‘docker kill’ or ‘docker rm -f’?hxeaiwe
Junior
Q20QBgP3:
rhkvruWhat is the difference between a Docker image and a container?uox
Junior
Q21Wuo:
irkohWhat is Hypervisor?dbts
Q22Iao:
tktHow can we control the startup order of services in Docker compose?ktbti
Q25MMaN:
Related To: Kubernetes, DevOps
gdoqWhich problems does a pmmltyzlxwjContainer Orchestrationspzqzvv solve?hymoogw
Related To: Kubernetes, DevOpsQ26evg:
Related To: Kubernetes
etiafExplain when to use Docker vs Docker Compose vs Docker Swarm vs Kuberneteswzap
Related To: KubernetesQ27r4o:
xbnawgaWhat is the preferred way of removing containers - ‘docker rm -f’ or ‘docker stop’ then followed by a ‘docker rm’?mzeemuw
Q28yFdKo:
Related To: Kubernetes, DevOps
acjiwcqWhat is the difference between Kubernetes and Docker?vcj
Related To: Kubernetes, DevOpsQ29NCh:
zwrvWhat is the default CPU limit set for a container?qfssy
Q305AqL:
scuWhat is the purpose of EXPOSE command in Dockerfile?ogf
Q312VA:
ikcknxWhat is the difference between “expose” and “publish” in Docker?xpdtl
Q32MIi:
ffxShould I use Vagrant or Docker for creating an isolated environment?hfwynwi
Q33aVbsA:
qihhzHow will you monitor Docker in production?ohtg
Q34cl5Xa:
gcqjnCould you explain what is Emulation?tiqt
Q35XT1t:
vvsbcWhat is the difference between CMD and ENTRYPOINT in a Dockerfile?xuoy
Q36AZC:
bzeggeWhat is virtualisation?ywqegpv
Q37AitO:
vfnaDocker Compose vs. Dockerfile - which is better?sms
Q38GLc:
tmnjWhat exactly do you mean by “Dockerized node”? Can this node be on-premises or in the cloud?okuweht
Q39pMOx:
clqWhat happens if you add more than one CMD instruction to a Dockerfile?nyy
Q40tCvce:
gkmylExplain basic Docker usage workflowyewpl
Q41TAM62:
rfcnuWhat is the difference between Docker Image and Layer?qxofhy
Q42BZSC3:
xklnwuCan you create containers wihout their own PID namespace?uii
Q43ZbT:
unwWhat is Docker Swarm?hrgre
Q44uUx4:
aizolmCan you explain dockerfile ONBUILD instruction?nbfxwtv
Q45wFL4H:
fjbCan you run Docker containers natively on Windows?qbzuif
Q46OIF:
ajdIs it good practice to run stateful applications on Docker? What are the scenarios where Docker best fits in?fookd
Q478La5:
nifatWhat are the different kinds of namespaces available in a Container?zrsihng
Q48mm5tT:
Related To: Kubernetes
kyjwlvfWhy do we need Kubernetes (and other orchestrators) above containers?erkzgpz
Related To: KubernetesQ49FoDC:
rmmybWhat is the difference between Docker RUN, CMD and ENTRYPOINT?adgssrv
Q50UeU:
Related To: DevOps
xsidHow is upwtpbContainerndhruydwg different from a xkdjkmlkuuwVirtual Machinezaokrbnijuhy?cruwdsg
Related To: DevOpsQ5169T5:
ggzzgzuWhat is Paravirtualization?kerk
Q52IWKX3:
cndrbiWhen you limit the memory for a container, does it reserve (guarantee) the memory?jnh
Q53YMi:
lnsdijIs it possible to generate a Dockerfile from an image?stdxx
Q549y1m:
xdfyWhat is an orphant volume and how to remove it?fac
Q550FrJT:
kavHow virtualization works at low level?ehign
Q56fJyR:
tfsoHow is Docker different from a virtual machine?cqc
Q57Yxb:
blkxqHow to use Docker with multiple environments?tzb
Q58Clz:
lpzsnsxWhy did Docker jump from version 1.13 to 17.03?nsyfyff
Q59C3PE:
nglnwuHow containers works at low level?fuspphy
Q60eFJ3L:
bjuyHow does Docker run containers in non-Linux systems?gjtma
Q614vMA:
nlngzWhy Docker compose does not wait for a container to be ready before moving on to start next service in dependency order?buhn
Q62z0nIY:
naynName some limitations of containers vs VMfeqh
Q63OpZ:
Related To: Kubernetes, DevOps
qbzrdoCan you explain a relationship between axpwlgbxqsdcontainer runtimepvbsqtjg and eveimplwyjucontainer orchestrationdrzqgoowqgd?sls
Related To: Kubernetes, DevOpsQ64hKiU:
Related To: Node.js
rvhfxpWhat's the difference between kkexhpm2hmnu and gtsgxtpm2-runtimerkkkmmq and when to use one?chwaalb
Related To: Node.jspm2hmnu and gtsgxtpm2-runtimerkkkmmq and when to use one?chwaalbCode Challenges
Q14o0g:
pajmyHow do I transfer a Docker image from one machine to another one without using a repository, no matter private or public?kgt
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Domain-Driven Design is nothing magical but it is crucial to understand the importance of Ubiquitous Language, Domain Modeling, Context Mapping, extracting the Bounded Contexts correctly, designing efficient Aggregates and etc. before your next DDD p...
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